Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Antĕ-vorta, ae, f. [verto], the name of a goddess who reminds men of things past (opp. Postvorta), Macr. S. 1, 7 (in Ov. F. 1, 633, and Serv. ad Verg. A. 8, 336, called Porrima).